Maxim Integrated 71M6533-DB - Manual (Page 29)

71M6533- DB Demo Board User’s Manual
Page: 29 of 75 ` REV 3
XRAM
Word
Address
Default
Value
Name Description
0x0B 0 PPMC
PPM/C*26.84. Linear temperature compensation. A positive
value will cause the meter to run faster when hot. This is applied
to both V and I and will therefore have a double effect on
products.
0x0C 0 PPMC2
PPM/C
2
*1374. Square law compensation. A positive value will
cause the meter to run faster when hot. This is applied to both V
and I and will therefore have a double effect on products.
0x0D PULSEX_SRC
This address contains a number that points to the selected pulse
source for the XPULSE output. Selectable pulse sources are
listed in Table 1-5.
0x0E PULSEY_SRC
This address contains a number that points to the selected pulse
source for the YPULSE output. Selectable pulse sources are
listed in Table 1-5.
0x0F 2 SCAL Count of accumulation intervals for auto-calibration.
0x10 2400 VCAL
Applied voltage for auto-calibration. LSB = 0.1V rms of AC signal
applied to all elements during calibration.
0x11 300 ICAL
Applied current for auto-calibration. LSB = 0.1A rms of AC signal
applied to all elements during calibration. Power factor must be
1.
0x12 75087832 VTHRSHLD
Voltage to be used for creep detection, measuring frequency,
zero crossing, etc.
0x13 50 PULSE_WIDTH
Pulse width in µs = (2*PulseWidth + 1)*397. 0xFF disables this
feature. Takes effect only at start-up.
0x14 -- TEMP_NOM
Nominal (reference) temperature, i.e. the temperature at which
calibration occurred. LSB = Units of TEMP_RAW, from CE.
0x15 -- NCOUNT
The count of accumulation intervals that the neutral current must
be above
INTHRSHLD required to set the “excess neutral” error
bit.
0x16 -- INTHRSHLD
The neutral current threshold.
16 2 IxSQSUM
 
LSB
Table 1-4: MPU Input Parameters for Metering
Any of the values listed in Table 1-5 can be selected for as a source for PULSEW and PULSER. The
designation “source_I” refers to values imported by the consumer; “source_E” refers to energy exported by the
consumer (energy generation).
Number
Pulse
Source
Description Number
Pulse
Source
Description
0 WSUM
Default for
PULSEW_SRC
18 VA2SUM
1 W0SUM 19 WSUM_I Sum of imported real energy
2 W1SUM 20 W0SUM_I Imported real energy on element A
3 W2SUM 21 W1SUM_I Imported real energy on element B
4 VARSUM
Default for
PULSER_SRC
22 W2SUM_I
Imported real energy on element
C
5 VAR0SUM 23 VARSUM_I Sum of imported reactive energy
6 VAR1SUM 24 VAR0SUM_I
Imported reactive energy on
element A
7 VAR2SUM 25 VAR1SUM_I
Imported reactive energy on
element B